Machine for polishing and grinding



Apro3, 11923. I 45533 c. L. HAWES MACHINE FDR POLISHING AND GRINDING Filed Nov. 26, 1919 4 sheets-sheet J flTrozA/Eva.

Apr. 3, 1923.

C. L. HAWES MACHINE FOR POLISHING AND GRINDING Filed NOV. 26, 1919 4 sheets-sheet 2 I, WW v 9% TTOIQ/VE vs.

[/v VEN roe (bar/fa Z. flaw/6L5 EASKLSSB Apr. 3 1923.

C. L. HAWES MACHINE FOR POLISHING AND GRINDING 4 sheets-sheet 3 Filed Nov. 26, 1919 Apm 3, 1923., H,45,853

C. L. HAWES MACHINE FOR POLISHING AND GRINDING Filed Nov. 26, 1919 4 sheets-sheet4 #TTOENEYeS.

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Patented Apr 3, lQZZih MAGHINE FOR PGLlSHENGr AND GRINDING.

Application filed November 26, 21919. Serial No. 3%,710.

To all whom it may concern Be it known that i, CHARLIE L. HAVES, a citizen of the UnitedxStates, and a resident of Ashtabula, county of Ashtahula, and

State of Ohio, have invented a new and use ful Improvement in Machines for Polishing and Grinding, of which the following is a specification, the principle of the invention being herein explained and the best mode in which I have contemplated applying that principle, so as to distinguish it from other inventions.

The present improvements, relating, as in-' dicated, to polishing or grinding machines. have more particular regard to machines of this type wherein two emery wheels are employed, such wheels being movable towards and from each other so as to operate con-- jointly on the article being polished. One ohject of the invention is to provide a mounting for such. wheels whereby their positions with respect to each other, and

thus to the article 'being operated on, may

he readily adjustable without interfering with the drive, the latter being secured from electric motors that are incorporated. in the machine as a part thereof. A further object of the invention is to provide a convenient and more or less automatic holder for the articles thus being operated on, so that the machine will require a minimum amount oi attention from the operator in charge of the same. ln its general features the machine is intended to be readily adaptable. hy simply changing the holder in question, for operation on a variety of articles.

To the accomplishment of the foregoing and related ends, the invention, then, consists of the means hereinafter fully descrihed and particularlypointed out in the claims, the annexed drawings and the following. description setting forth in detail certain mechanism embodying the invention, such disclosed means constituting, however, hut several oi the various mechanical forms in which the principle of the invention may he used.

ln said annexed drawings l igr. l is a front elevation of a machine specifically intended for polishing or grinding chisels; Fig. 2 is a side elevation of such machine. as viewedfrom the right in Fig. 1', Fig. 3 is a section of a detail thereof, taken on the plane indicated by the line Il-3. Fig. 2; Fig. dis a section of another detail, taken on the plane indicated by the line Mtt, and showing the work-holding" member in side elevation as viewed from=the left in Fig. 1; Fig. 5 is still another section taken on the plane indicated by the line 5-5, Fig. 1; Figs. 6 and 6 are more or less diagrammatic views illustrating the operation of grinder on a chisel in two ditlerent stages; Fig. 7 is a front elevati n, and Fig. 8 a side elevation, of a modified form of the machine adapting same for polishing the faces of thread-cutting dies; or other similar articles; and Figs. 9 and 10 are respectively a front elevation and a side elevation of a further modification adapting the machine for polishing or grinding small cylindrical articles which require to he rotated about their axes while being operawd upon.

Referring to the form of machine illustrated in Figs. 1 to 6 inclusive, he various parts. it will he seen,'are supported on a suitable upstanding frame or base 1 of substantial construction. Mounted on the top of such base are two transversely spaced. bearing members 2, 2 to which are pivotally attached, about parallel axes 3, 3, a pair of oscillatory arms 4, t, provided with rectan'gularly related faces, the longer of which is disposed in an approximately vertical plane, the other being approximately horizontal. Vertically adjustahly secured to such longer face of each arm 4 is suitahle self-contained electric motor 5, the spindle of which carries on its rear end helt pulley 6; while transversely adjustahly mounted on the upper, approximately horizontal, face of each arm is a housing" 7 wherein is journaled the spindle 8 of one of the polishing or grinding wheels 9. Such wheel is mounted on the "front end of its spindle. the rear end being provided with a pulley 1O aligned with pulley 6 and connected to lie driven from the latter by the belt ll.

The particular construction of the wheels 9 is a matter of indifference so far as the essential features of the invention are concerned, but for polishing chisels, for example, as in the case in hand, such wheels will he of emery.

The motors 5. by reason of their weight, and d sposition with respect to the pivotal axes 3 of the frames 4 to which they are at tached, will tend to swing the lower ends of such frames inwardly, and such inward. movement of the lower ends of the arms, however produced, will obviously swing the spindles 8, and thus the wheels 9, outwardly 0r apart from each other.

i. e.,.towards each other, a rock shaft 15 is journaled preferably centrally in the base 1, and provided with cross arms 16 connect ed by means-of links 17 with the lower ends of the respective frames 4:. Another arm 18 attached to said shaft 15 at right angles to the arms 16 is provided with a counterweight 19 that is heavy enough to overcome the aforesaid effect of the motors, and so actually tend to force the lower ends of the arms 4 apart and move the wheels 9 towards each other. Still another arm 20 is attached to the shaft 15 projecting in a direction opposite to that of arm 18, and is connected by means of a link 21' with a foot lever 22, the result being that by depressing such lever the shaft may be rocked in a direction to move the lower ends of the arms 4 inwardly, and thus separate the wheels 9. Outward movement of the lower arm-ends under the influence of counter-weight 19 is limited by means of adjustable stops 12, whereby the wheels 9 may be allowed to approach each other as closely as desired, with- ,out actually contacting.

The holder for the work, which consists as aforesaid of chisels in the case of the specific machine in hand, comprises a disk 25 rotatably supported on a spindle 26 that is disposed transversely of the axes of Wheels 9 and at a suitable distance below the same so that said disk may be moved back and forth between wheels without interfering with the latter. In addition it is desirable that the disk be capable of vertical movement in order to properly feed the work between the wheels, as will be presently described. For the purpose of such movement the spindle 26 is carried on the upper end of a sleeve 27 slidably keyed on a supporting arm 28 that is pivotally attached to a bracket 29 on the front face of the base 1 so as to be oscillatory in a plane at right angles to such face. A compression spring 30 interposed between sleeve 27 and lower end of arm 28 tends normally to raise such sleeve, while to lower same against the spring a foot pedal 31, connected with said sleeve through the medium of a link 32, is provided.

The disk 25'is formed with a plurality of radialpockets 35, adapted to receive the chisels a when directed forwardly. and to present the same in alignment with 'the wheels 9 when directed upwardly. and, subsequently, following further rotation of the disk, to discharge such ch sels to the rear of the machine. The pockets are equidistantly spaced about the periphery of the disk, and a spring-pressed plunger 36, best shown in Fig. '5, is provided to retain the disk with successive pockets in desired alignment with wheels 9, the inner end of In order to move the wheels in a contrary dlrectlon,

such plunger engaging a corresponding series of shallow depressions 37 in the adjacent face of the disk. For the purpose of automatically indexing the disk a ratchet wheel 38 is attached to the opposite face thereof, having teeth corresponding in number and disposition with the pockets 35, and a pawl 39 pivotally attached by means of a bracket to the adjacent portion of the machine base, is actuated by a spring 40 to engage successive teeth and impart a fractional rotation to the disk, as the latter is alternately lowered and then raised-through actuation of foot lever 31. A handle 11 is provided for manually swinging the disk in and out between the grinding wheels, the range of movement in this direction being limited.

The mode of operation of the machine, the construction of which has just been described, will be readily apparent. The op erator stands in front of the machine and places unground chisels in the pockets 35 of the disk as fast as they are presented at the proper angle. Assuming the foot lever 31 to be depressed, the effect of the upward movement of sleeve 27, when such lever is released is to cause rotation of disk 25 due to the engagement of pawl 39 with the adjacent tooth on the ratchet. The next chisel inseries is thus brought into position between the wheels. the latter being simultaneously forced apart by depressing footlever 22. Upon releasing such last mentioned lever, the wheels are moved towards each other under the action of weight 19 until they engage the chisel a as shown .in Fig. 6. Thereupon, the foot-lever 31 is gradually depressed again until the chisel occupies the position shown in Fig. 6 the wheels following the tapered sides of the chisel. Incidentally. the operator. by grasping handle 41, swings the disk back and forth, through a slight are. so as to cause the chisel to contact with different transverse portions of the wheel faces, in order to avoid wearing a groove therein.

The machine illustrated in Figs. 7 and S is of the same general design as the one just described,-except. for the work-holder. ln other words, the grinding or polishing wheels 9 are mounted and driven in identically the same fashion as before. In place. however, of a disk having radial pockets for the reception of chisels. or like articles. the ends or points of which require to be ground, I here provide a disk 45 having transverse apertures 46 near its periphery. .of the proper size to receivefiat cylindrical articles, such as thread-cutting dies. or other similar articles, the opposite faces of which require to be polished.

the upper end of a swinging frame 48 that This disk is rotatably mounted about a spindle 47 carried in Ell All

to the machine base it through the medium of brackets all The disk is intended to be continuously driven in a clockwise direction as viewed in Fig. 8, through the medium of recta'ngularly related shafts 50 and having bevel-gear connection as shown.- in Fig. 7, the latter of said shafts having worm and worm-gear connection with the spindle l7. Segmental. plates '52 enclose the respective sides of the disk 45 for somewhat less than half of its inwardly directed circumference, i. e., that which lies between the grinding wheels, such plates being recessed or broken away at points directly adjacent the juntaposed portions of the wheels so to expose the dies or other articles held in the pockets ll to the rinding or polishing action of the Wheels- 3 handle 53 on the upper end of frame 48 enables the operator to swing the frame, and thus the disk, back and forth between the grinding Wheels, as will be readily understood. from the description of the previous machine. i

The mode of operation of the special sign of machine just described should be entirely clear. The articles to be ground inserted in apertures so in disk and as the latter rotates are carried between plates 52, and thence downwardly into position to be operated on by the Wheels in passing through bet-ween such wheels their opposite flat faces, which it will he understood project a suflicient distance beyond the corresponding faces oi the disk, are ground or polished to the extent required, and such art cles are thereupon discharged lroni the dislt in the lower course of its travel, chu 54 serving to guide them into sultan receptacle.

in F and 10 is shown still another modified form of holder, the same being designed more 'iarticular f winding cylindrical faces of cylind"irnlly-shaped ticlcs. Such an article obviously requires to be rotated about its unis while being' ground. Accordingly, the holder 55, wine" is carried at the upper end ot an arm so similar to previously tescribed arm .48, in addition to being rotatable about its own axis 57, carries a plurality of radially pro 'ecting chucks 58. The latter are arrang i to be rotated at proper oi speed through bevel-gear connected shaits 51) and (S0. The details of the. connection between shalt S0 and the individual chucks 58 oi the holder need not be described in detail, as they form no part of the claimed invention. herein.

in operating this last described type oi my improved machine, the holder may be either indexed by hand or automatically. and whenever a chuck is presented in what may he termed the three ()klOCli position in Fig. the article carried thereby will be r tatcd between the juxtaposed faces of wheels Upon a further fractional rotation of the holder the article in the next succeeding chuck is thus brought into operative position, While the finished article may be re-, moved -from its chuck and a fresh one inserted.

It Will be understood that in both of the modified constructions illustrated in Figs. 7 and 8, aiid 9 10, respectively, the main ner of mounting the Wheels 9 is substantially the same as that shown in Figs. 1 and 2; and such wheels are arranged to be separated and brought together through suitable counter-weight and pedal, or other operative means, as successive are presented therebetween to be ground or polished. Moreover, the type of holder first described, i. e., that shown in Figs, 1 to 53 inclusive, is susceptible of use with a wide variety articles in addition to the chisel specifically referr to. Thus, for example, said holder vmay be readily arranged to receive square taper recliners, gauges, plier handles having flat surfaces, planer knives, steel wedges, lathe tools, etc.

Other; modes of applying the principle oi": my invention may be employed instead of the one explained, change being made as regards the mechanism herein disclosed, firovidcd the means stated any of the rollovv'ing claims or the equivalent of such stated means be employed.

I therefore particularly point out and distinctly claim as y invention:

1. in a machine of the character oescribcd, the combination with a suitable base; of tun arms oscillatorily sup orted thereon about spaced parallel axes; a spindle mounted on each arm above and parallel with its axis, adapted to receive polishing or grinding Wheel, said spindle being justahle transversely of such axis in an approximately horizontal plane; and an electric motor mounted on each arm slow its connected to (lure the correspoinling said motor being adjustable transversely or such axis in an approxim .ly vertical plane. a machine of the cl acter described,

the combination with a suitable base of two arms oscillatorily supported thereon about spac parallel axes; a spindle mounted on each ari'n above and .paiallel with its ZlBlis, adapted to receive a polishing or grinding wheel; an elect 'ic motor mounted on each mm below its axis and connected to drive the corresponding' spindle; means normally adapted to swing said arms in unison oppositely about their respective axes toward each other and exteriorly operable means adapted to swing; said arn i; so as to move said wheels apart.

in a machine of the character described the combination with a suitable base; 01 two arms; osciliacorily supported thereon about spaced parallel axes a spindle mount Kill ed on each arm above and parallel with its axis, adapted to receive a. polishing or grinding wheel; an electric motor mounted on each arm below its axis and connected to drive the corresponding spindle; a counterweight connected to swing said arms in unison about their respective axes so as to move said wheels towards each other; and adjustable means li'mitin such movement.

4-. Ina mac ine of the characterdescribed, the combination with a suitable base; of two arms oscillatorily supported thereon about spaced. parallel axes; a spindle mounted on each arm above and parallel with its axis, adapted to receive a polishing or grinding wheel; an electric motor mounted on each arm below its axis and connected to drive the corresponding spindle; a counterweight connected to swing said arms in unison about their respective. axes so as to move said wheels towards each other; and exteiorly operable means adapted'to swing said arms so as to move said wheels apart.

5. In a machine of the character described the combinationwith a suitable base; of two arms oscillatorily supported thereon about spaced parallel axes said arms having an upper and a side face lying in approximately a horizontal and a vertical plane respectively; a housing mounted on such upper face of each arm so as to be adjustable transversely of the latters axis; a spindle mounted in such housing parallel with such axis, adapted to'receive a polishing or grinding wheel; an electric motor mounted on the side face of each such arm so as to be adjustable transversely of the latters axis and connected to drive the corresponding spindle; a rock-shaft mounted in said base and provided with cross-arms; links connecting said cross-arms with said oscillatory arms to swing the same in unison oppositely about their respective axes; means tending to turn said rocloshatt in-one direction; and other exteriorly operable means adapted to turn said shaft in the opposite direction.

6. In a machine of the character described, the combination with a suitable base; of two arms oscillatorily supported thereon about spaced parallel axes said arms having an upper and a side face lying in approximately a horizontal and avertical plane respectively; a housing mounted on such upper face of each arm so as to be adjustable transversely of the latters axis; a spindle mount-- ed in such housing parallel with such axis, adapted to receive a polishingor grinding wheel; an electric motor mounted on the side face of each such arm so as to beadjustable transversely ofthe latters axis and connect ed to drive the corresponding spindle; a rock-shaft mounted in said base and provided with cross-arms; links connecting" said cross-arms with said oscillatory arms to swing the same in unison oppositely about their respective axes; a. counter-weight tending to turn said rock-shaft in one direction; and'a foot-pedal connected with said rocln shaft adapted to turn the same in the opposite direction when desired.

'2". In a machine of the character described the combination with a suitable base; of two arms oscillatorily supported thereon about laterally spaced parallel axes; a spindle mounted on each. such arm adapted to receive a polishing or grinding wheel; and a'workholding member movable between said spindles independently in a direction parallel with and in a direction transverse of such axes.

8. In a machine of the character described, the combination with a suitable base; of two arms oscillatorily supported thereon about laterally spaced parallel axes; a spindle mounted on each such arm adapted to receive a polishing or grinding wheel; a. support oscillatory about an axis transverse of the axes of said arms; and a work-holding member carried by said support and movable in. a plane parallel to said spindles upon oscillation of said support.

9. In a machine of the character described the combination with a suitable base; of two arms oscillatorily supported thereon about laterally spaced parallel axes; a spindle mounted on each such arm adapted to receive a polishing; or grinding wheel; a support oscillatory about an axis transverse of the axes of said arms; and a work-holding member carried by said support and movable in a direction parallel with said spindles upon oscillation of said support. said member being also movable longitudinally of said support.

10. In a machine of the character described, the combination with a suitable base: of two arms oscillatorily supported thereon about laterally spaced parallel axes; a spindle mounted on each such arm adapted to receive a polishing or grinding wheel; a support oscillatory about an axis transverse of the axes of said arms; and a work-hold ing member carried by said support and movable in a direction. parallel with said spindles upon oscillation of said support. said memher being also rotatable. independently of the foregoing movement. about an axis transverse of said spindles.

ll. ln a machine of the character described. the combination with a suitable base; of two arms oscillatorily supported thereon about laterally spaced parallel axes: a spindle mounted on each such arm adapted to receive a polishing or grinding wheel; a support oscillatory about an axis transverse of the axes of said arms; and a work-holdins member carried by said support and movable between said spindles in a direction parallel therewith upon oscillation of said support, said member being also ro- Ell tatable about ail-axis transverse of said spindles and movable longitudinally of said suport. p 12. In a machine of the character described, the combination with a suitable base; of two arms oscillatorily supported thereon about laterally spaced parallel axes; a spindle mounted on each such arm adapted to receive a polishing or grinding wheel; a

support oscillatory about an axis transverse the combination with a suitable base; of

two arms oscillatorily supported thereon about laterally spaced parallel axes; a spindle mounted on each such arm adapted to receive a polishing or grinding wheel; a support oscillatoryabout an axis transverse of the axes of said arms; and-a work-holding member carried by said support and movable between said spindles in a direction parallel therewith upon oscillation of said support, said member being also rotatable about an axis transverse of said spindles and having a plurality of radially disposed work-receiving pockets adapted to bring articles held thereby successively into operative relation with the wheels on said spindles.

14. In a machine of the character described, the combination with a suitable base; of two arms oscillatorily supported thereon about spaced parallel axes; a spindle mounted on each such arm adapted to receive a polishing or grinding wheel; a support 0sw-illatory about an axis transverse of the axes of said arms; and a work-holding member carried by said support and movable between said spindles in a direction parallel therewith upon oscillation of said support, said member being also rotatable about an'axis transverse of said spindles and movable longitudinally of satid, support; and means adapted to index said member'upon movement thereof thus longitudinally of said support.

15. In a machine of the character described, the combination with a suitable base; of two arms oscillatorily supported thereon about spaced parallel axes;a spindle mounted on each such arm adapted to receive a polishing or grinding wheel; a support oscillatory about an axis transverse of the axes of said arms; a sleeve reciprocable longitudinallly of said support; and 'a workholding member carried by said sleeve and rotatable about an axis parallel with that of said support; and means adapted to index said member upon reciprocation of said sleeve.

16. In a machine of the character described, the combination with a suitable base; of two arms oscillatorily supported thereon about spaced parallel axes; a spindle mounted on each such arm adapted to receive a polishing or grinding wheel; a support oscillatory about anaxis transverse of the axes of said arms; a sleeve reciprocable longitudinallly of said support; and a workholding member carried by said sleeve and rotatable about an axis parallel with that of said support; and means adapted to index said member upon reciprocation of said sleeve, said means including a ratchet on said member and a pawl attached to said base and engaging successive teeth on said ratchet.

Signed by me, this 25th day of November, 1919.

CHARLIE L. HAWES. 

